System of connections



H. SUNDHAUSSEN.

SYSTEM OF CONNECTIONS.

APPLICATION mu) SEPT- 3'. 1920.

Patented Aug. 9, 1921, 7

UNITED STATES PATENT OFFICE.

HERMANN SUNDEAUSSEN, OF ESSEN, GERMANY, ASSIGNOB TO FRIED. KRUIP AKTIENGESELLSCH AFT, OF E SSEN-ON-THE-RUHR, GERMANY.

SYSTEM OF CONNECTIONS.

To all whom it may concern.-

Be it known that I, HERMANN SUNDHAUS- SEN, residing at Essen, Germany, a citizen of the German Republic, have invented a certain new and useful Improvement in Sysmeans of either keeping the strength of the current of equal value inboth divisions of the divided current circuit when one of the said members moves relatively to the other or varying it in unequivocal dependence upon the amount of the movement.

The invention will now. be described withthe aid of the accompanying diagrammatical drawing. p

A denotes a cylindrical member adapted to rotate about its axis to which a conducting piece a is rigidly attached. The conducting piece a is electricallyconnected to the positivepole of a source of current and rubs over ajcirc'ularly; shapedvariable resistance b which] is rigidly connected to a member B adapted to rotate about the axis of rotation of the member A. The two ends of the variable resistance b are each electrically connected by conductors b and b with the ends c and 0*of two similarly shaped variable resistances 0 and 0 both of which are rigidly attached to a member C adapted to rotate about the common axis of rotation of the members A and B. Over the resistances and c and in rubbing contact therewith two conducting pieces 07 and d, are mounted on amember D adapted to rotate relatively to the member C and are connected by the conductors d and d by means of a commonconductor d to the negative pole of the source of current.

All the variable resistances extend in the manner shown in the drawing over the same central point angle and are so constructed that equal central point angles correspond to equal variations of the resistance.

As can be seen from the drawing, the conducting piece al forms the starting point of Specification of Letters Patent.

Patented Aug. 9, 1921.

Application filed September 3, 1920. Serial No; 408,088.

nections is traversed by a current and all.

the parts are in the position shown in the drawing, it is obvious that the strength of the current on both current divisions possesses an equal value.

Now if the member A for example and consequently the conducting piece a rigidly connected thereto be rotated in the direction of the arrow w through anangle a that partof the variable resistance 6 which lies in the current division containing the resistance 0 will be reduced by an amount correspond ing to the angle a, while that part of the variable resistance [9 which lies in the cur-,

rent division which contains the variable re-,

sistance c will be increased by a like amount also corresponding to the angle a.

The total resistance of the first mentioned I current division will in this way be diminished by the same amount that the total re sistance of the last mentioned current division increases, no change having taken place in the relative. osition of the other parts affected. Accor ingly, the current strength in eachof thetwo divisions is positivelyde termined by the angle of rotation a.

The same result takes place, as can be readily seen without further description, if in place of the stationary member A, the

be rotated through an angle a.

If on the other hand the members B and C for example be rotated conjointly in the direction of the arrow 50 through the angle a, then with the construction of the variable resistances shown in the drawing that part of the variable resistance 72 situated in the current division containing the variable resistance 0 will be increased by an amount corresponding to the angle of rotation a, and the part of the variable resistance 0 situated in the same current division will be decreased by a like amount. Furthermore on the aforesaid conjoint rotation of the member B, the member C or the member D members B and C that part of the variable resistance 6 lying in the other current division will be reduced by the same amount (corresponding to the angle a) that the part of the variable resistance 0 lying in the last mentioned circuit is increased. The total value of the resistance lying in each current division will therefore not be altered by the aforesaid conjoint rotation of the members B and C, and the strength of the current in each current division retains its value unchanged.

Corresponding conditions occur if the members B and C remain at rest and the members A and B are rotated in the direction of the arrow 0 through an angle a. In this case also the total value of the resistance lying in the two current divisions does not alter on the aforesaid rotation of the members A and D, and the strength of-the current consequently retains its original value during the rotation.

In like manner, as can be seen without further explanation, no change takes place in the strength of the current flowing in the two current divisions, when the two members C and D are rotated conjointly.

Finally the value of the strength of the current in the two current divisions remains unaltered if the members A and C and B and D be rotated conjointly, but in this case however the conductors b and 6 would be connected to the two other ends of the variable resistances 0 and 0 The above described system of connections affords a means of varying the strength of the current in the two divisions of a two-part current system, in which the acting parts are mounted on four members adapted to be moved relatively to each other, such variations being proportional to the angle of rotation when one of the members concerned is rotated and of keeping it unaltered on the rotation of two of the members concerned simultaneously and in the same direction.

The provision of these two possibilities is of particular value when it is required to use this system in connection with a long distance controlling device in which a con joint rotation of the two members cannot be avoided and where the said rotation is not to have any influence on the adjustment of the part to be adjusted.

\Vithout altering the essential feature of the invention it would be quite possible to make the variable resistances rectilinear for example. In this case the members corresponding to the members A, B, C and D would have to be longitudinally movable relatively to each other.

Claims.

1. System of connections for regulating the strength of a current in the divisions of a two-part divided current circuit, characterized by the fact, that two points of a variable resistance (7) movable relatively to a conducting piece ((0 electrically connected to one pole of a source of current which forms the starting point of the current division, are respectively connected to one end of two variable resistances (0 a) movable conjointly relatively to the aforesaid variable resistance (5 and that the conjointly movable variable resistances (6 0) have in rubbing contact therewith respectively two conducting pieces ((Z, (P) also movable conjointly relatively thereto and from which a common conductor (6Z leads to the other pole of the source of current.

2. System of connections according to claim 1, characterized by the fact that all the variable resistances (b 0 are of circular shape, are adapted to rotate about the same axis and are so constructed that equal central point angles correspond to equal variations of theresistances.

The foregoing specification signed at lissen, Germany. this 20th (lav of Mav. 192i).

HERMANN SUNDHAUS SEN. In presence of Hans Gorrsammv, Josnr O. OLBERTZ. 

